OpenStack services can be installed either as root or as a user with sudo permissions. The latter may require that the user be added to the sudoers file on each host. For tips on configuring sudoers, please visit the following URL:

http://wiki.centos.org/TipsAndTricks/BecomingRoot

For this installation, all commands should be run as root unless specified otherwise.

Installation of OpenStack on CentOS uses packages from the RedHat RDO repository. To enable the RDO repository, download and install the rdo-release-havana package on all hosts:

# rpm -ivh http://repos.fedorapeople.org/repos/openstack/openstack-havana/rdo-release-havana-8.noarch.rpm

The EPEL package includes GPG keys to aid in signing packages and repository information and should be installed on all hosts:

# rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64...